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Abstract <p>This study introduces the synthesis of two novel disperse dyes based on sulfur derivatives, characterized using spectroscopic analytical methods, and evaluates their application as a colorant for printing ink, and also, in dyeing polyester fabrics under varied conditions (time, temperature, shade, and pH). The prepared dyes demonstrated significant advancements in dyeing performance, with color strength values increasing as dyeing temperature (90–130&#xa0;°C) and time (15–45 min) increased. These dyes produced exceptional brightness, levelness, diverse hues, light&#xa0;fastness, washing, crock, and alkali perspiration fastness on PET fibers, showcasing their suitability for polyester dyeing and printing. The study's novelty lies in the development of these dyes using a green chemistry method, ensuring environmental sustainability. Moreover, TD-DFT analysis revealed strong optical properties in the dyes, attributed to specific electronic transitions. Dye <b>4</b> exhibited a favorable balance of reactivity, with a smaller energy gap, higher softness, and increased electrophilicity, making it ideal for applications such as photodynamic therapy or dye-sensitized technologies. This work highlights innovative pathways for creating high-performance dyes with significant environmental and industrial relevance. This version explicitly highlights the novelty (green chemistry, methyl pyrimidine group) and effectiveness (improved brightness, optical properties, fastness properties and practical applications).</p> Graphical Abstract <p></p>

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Innovative Synthesis and Application of Bridged Nitrogen Heterocycles: From Diazotized Sulfur Dyes to Enhanced Polyester Fabrics

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Ola A. Abu Ali,
  • Ali A. Ali,
  • Nashwa M. Saleh,
  • M. M. Elsawy,
  • Ahmed A. El-Henawy,
  • H. Abd El-Wahab

摘要

Abstract

This study introduces the synthesis of two novel disperse dyes based on sulfur derivatives, characterized using spectroscopic analytical methods, and evaluates their application as a colorant for printing ink, and also, in dyeing polyester fabrics under varied conditions (time, temperature, shade, and pH). The prepared dyes demonstrated significant advancements in dyeing performance, with color strength values increasing as dyeing temperature (90–130 °C) and time (15–45 min) increased. These dyes produced exceptional brightness, levelness, diverse hues, light fastness, washing, crock, and alkali perspiration fastness on PET fibers, showcasing their suitability for polyester dyeing and printing. The study's novelty lies in the development of these dyes using a green chemistry method, ensuring environmental sustainability. Moreover, TD-DFT analysis revealed strong optical properties in the dyes, attributed to specific electronic transitions. Dye 4 exhibited a favorable balance of reactivity, with a smaller energy gap, higher softness, and increased electrophilicity, making it ideal for applications such as photodynamic therapy or dye-sensitized technologies. This work highlights innovative pathways for creating high-performance dyes with significant environmental and industrial relevance. This version explicitly highlights the novelty (green chemistry, methyl pyrimidine group) and effectiveness (improved brightness, optical properties, fastness properties and practical applications).

Graphical Abstract